To pay for her brother Leo's exorbitant medical bills, 22-year-old art student Emma Vance turns in desperation to the mysterious underground organization "Sanguine Solutions" to sell her blood. She thought it was just a transaction, unaware she had become prey to an ancient being. Elias Thorne, a vampire who has lived for six centuries, had long grown numb to immortality. Until he tasted Emma's blood—that vibrant, burning life force instantly shattered his centuries of deathlike emptiness. She wasn't ordinary "food"; she was the legendary "Anam Cara"—soulmate, destined blood. "It doesn't belong to Sanguine Solutions, nor does it belong to you. It belongs to me." When Elias found her, Emma's world collapsed completely. He invaded her home, crushed her boyfriend, and used her brother's life as leverage to force her to sign a devil's contract: surrender her freedom and become his exclusive "property." From imprisonment to submission, from resistance to desire— Emma is trapped in a luxurious cage above the clouds, becoming Elias's "canary." She tries every means to resist, even threatening him with death, only to be easily tamed by this powerful predator. More terrifying still, each feeding—that "blessing" mixing pain with extreme pleasure—is quietly transforming her soul. The mingling of blood establishes an unbreakable bond; she can feel his emotions, while his possessiveness follows her like a shadow.